Revenue depends on several variables so it may differ but I according to adsense statistics click ratio was twice and revenue was 5 times according to previous Sunday.
But the user experience is awful. It wont take long before they moan abut the ads appearing everywhere.
Here are the lists where ads appear ( I already have 3 ads, 2 below the menü , 1 on top of sidebar, the followings are additional )
Desktop;
Forum View ;
On top and bottom of (NB40) Recent Topics/Posts side bar widget
On top of Popular Contributors
Total : 6 Ads ( 3 already existed )
Mobile ;
On top of page ( anchor ads, these used to be on bottom of page before 4.2 )
On some of the links ( vignette )
Between Categories
Between Subforums
Total : 9 ads ( except any vignette that may occur on clicking a link )
I will unselect the options one by one and see how it will affect